题解 | #自动售货系统#

#include <bits/stdc++.h>
using namespace std;
typedef struct Price{
    int A1;
    int A2;
    int A3;
    int A4;
    int A5;
    int A6;
    Price():A1(2),A2(3),A3(4),A4(5),A5(8),A6(6){}
}T_Price,*P_Price;
typedef struct Product{
    int A1;
    int A2;
    int A3;
    int A4;
    int A5;
    int A6;
    int sum;
    Product():A1(0),A2(0),A3(0),A4(0),A5(0),A6(0),sum(0){}
}T_Product,*P_Product;
typedef struct RMB{
    int one;
    int two;
    int five;
    int ten;
    RMB():one(0),two(0),five(0),ten(0){}
}T_RMB,*P_RMB;
/*******************初始化字符串，保存商品 和 金币 *********************/
vector<string> dispose_all_string(string &str);// 最初处理字符串
vector<int> dispose_str(string &str);// 处理商品和金币字符串
void inital_product_and_rmb(string &str,P_Product product,P_RMB rmb);
vector<string> intital_store(string &str,P_Product product,P_RMB rmb);
/*******************初始化字符串，保存商品 和 金币 *********************/
void pay(int& balance,int rmb,P_RMB p_rmb,P_Product p_prod);//投币函数
void buy(int& balance,string& str,P_Price p_price,P_Product p_prod);
void back(int& balance,P_RMB p_rmb);
void find(string& str,P_Price p_price,P_Product p_prod,P_RMB rmb);
int main(void){
    string str;
    getline(cin, str);
    T_Product product;
    T_RMB rmb;
    T_Price price;
    int balance = 0;
    // 初始化商品和剩余金币，operat 1开始保存操作字符
    vector<string> operat = intital_store(str,&product,&rmb);

    for(int i = 1 ; i < operat.size() ;++i){
        switch(operat[i][0]){
            case 'p':
                operat[i].erase(0, 2);
               // int p = atoi(operat[i].c_str());
                pay(balance, atoi(operat[i].c_str()), &rmb, &product);
                break;
            case 'b':  
                operat[i].erase(0, 2);
                buy(balance, operat[i], &price, &product);// A1
                break;
            case 'c':
                back(balance, &rmb);
                break;
            case 'q':
                find(operat[i],&price, &product,&rmb);
                break;
        }
    }
    
}
void find(string& str,P_Price p_price,P_Product p_prod,P_RMB rmb){
    //cout << str <<"++++++"<<endl;
    if(str[1] == ' ' && str.length() == 3){
        if(str[2] == '0'){
            for(int i = 0 ; i < 6 ; ++i)
                cout << "A" << i+1 << " "  << *((int*)p_price + i)<< " " << *((int*)p_prod + i) << endl;
        }else if(str[2] == '1'){
            cout << "1 yuan coin number=" << rmb->one << endl
                     << "2 yuan coin number=" << rmb->two << endl
                     << "5 yuan coin number=" << rmb->five << endl
                     << "10 yuan coin number=" << rmb->ten << endl;
        }
    }else
        cout << "E010:Parameter error" << endl;
}
void back(int& balance,P_RMB p_rmb){
    if(balance == 0)
        cout<< "E009:Work failure"<<endl;
    else{
        int ten = balance / 10;
        if(ten < *((int*)p_rmb + 3)){
            *((int*)p_rmb + 3) -= ten;
            balance %= 10; 
        }else{
            balance -= *((int*)p_rmb + 3) * 10;
            *((int*)p_rmb + 3) = 0;
        }
        int five = balance / 5;
        if(five < *((int*)p_rmb + 2)){
            *((int*)p_rmb + 2) -= five;
            balance %= 5; 
        }else{
            balance -= *((int*)p_rmb + 2) * 5;
            *((int*)p_rmb + 2) = 0;
        }
        int two = balance / 2;
        if(two < *((int*)p_rmb + 1)){
            *((int*)p_rmb + 1) -= two;
            balance %= 2; 
        }else{
            balance -= *((int*)p_rmb + 1) * 2;
            *((int*)p_rmb + 1) = 0;
        }
        int one = balance ;
        if(one < *((int*)p_rmb )){
            *((int*)p_rmb) -= one;
            balance = 0; 
        }else{
            balance -= *((int*)p_rmb);
            *((int*)p_rmb) = 0;
        }
        cout << "1 yuan coin number=" << one << endl;
        cout << "2 yuan coin number=" << two << endl;
        cout << "5 yuan coin number=" << five << endl;
        cout << "10 yuan coin number=" << ten << endl;
    }
}
void buy(int& balance,string& str,P_Price p_price,P_Product p_prod){
    //指针操作获取结构体中的数值，两种写法
    int *p = (int *)p_prod;
    //if(str != "A1" || str != "A2" || str != "A3" || str != "A4" || str != "A5" || str != "A6" ){
    if(str[0] != 'A' && str[1] < '7' && str[1] > '0'){
        cout << "E006:Goods does not exist"<< endl;
    }else if( *(p+(str[1]-'1')) == 0){
        cout << "E007:The goods sold out"<<endl;
    }else if(balance < *((int *)p_price+(str[1]-'1'))){
        cout << "E008:Lack of balance"<<endl;
    }else{
        balance -= *((int *)p_price+(str[1]-'1'));
        -- *(p+(str[1]-'1'));
        --p_prod->sum;
        cout << "S003:Buy success,balance="<<balance<<endl;
    }
}
void pay(int& balance,int rmb,P_RMB p_rmb,P_Product p_prod){
    
    if(rmb == 1 || rmb == 2 || rmb == 5 || rmb == 10){

        if(rmb > 2 && (p_rmb->one + p_rmb->two *2) < rmb){
            cout << "E003:Change is not enough, pay fail"<<endl;
            return;
        }
        if(p_prod->sum == 0){
            cout << "E0E005:All the goods sold out"<<endl;
            return;
        }
        balance += rmb;
        if(rmb == 1)++ *(int*)p_rmb;
        if(rmb == 2)++ *((int*)p_rmb + 1);
        if(rmb == 5)++ *((int*)p_rmb + 2);
        if(rmb == 10)++ *((int*)p_rmb + 3);
        cout << "S002:Pay success,balance="<<balance<<endl;
    }else{
        cout << "E002:Denomination error"<<endl;
    }
}
vector<string> intital_store(string &str,P_Product product,P_RMB rmb){
    //product = Product()
    vector<string> init_ = dispose_all_string(str);
    inital_product_and_rmb(init_[0],product,rmb);
    cout << "S001:Initialization is successful"<<endl;
    return init_;
}
vector<string> dispose_all_string(string &str){
    vector<string> tmp;
    string st;
    for(auto &c : str){
        if(c != ';')st += c;
        else{
            tmp.push_back(st);
           
            st = "";
        }
    }
    return tmp;
}
void inital_product_and_rmb(string &str,P_Product product,P_RMB rmb){
     string tmp;
    vector<string> res;
    for(auto &c : str){
        if(c != ' ')tmp += c;
        else{
            res.push_back(tmp);
            tmp = "";
        }
    }
    res.push_back(tmp);
    vector<int> pro = dispose_str(res[1]);
    vector<int> rm  = dispose_str(res[2]);
    product->A1 = pro[0];
    product->A2 = pro[1];
    product->A3 = pro[2];
    product->A4 = pro[3];
    product->A5 = pro[4];
    product->A6 = pro[5];
    product->sum = pro[0]+pro[1]+pro[2]+pro[3]+pro[4]+pro[5];
    rmb->one = rm[0];
    rmb->two = rm[1];
    rmb->five = rm[2];
    rmb->ten = rm[3];   
}
vector<int> dispose_str(string &str){
    int cnt = 0;
    for(auto &c:str){
        if(c == '-') ++cnt;
    }
    ++cnt;
    vector<int> res_int(cnt,0);
    string res_str;
    cnt = 0;
    for(auto &c:str){
        if(c != '-') res_str += c;
        else {
            res_int[cnt] = atoi(res_str.c_str());
            ++cnt;
            res_str = "";
        }
    }
    res_int[cnt] = atoi(res_str.c_str());
    return res_int;
}